i just installed a set of Dc 4-2-1 headers in my 96 GSR and now i have a rattling noise that seems to be coming from around the catalytic converter. i checked everything, nothing is loose and the header is not vibrating on the engine block. anyone have a solution or have had this problem? it sometimes has a rattling noise when im driving and when my car is idling around 500rpms

 

You should raise your idle. Stock idle is 750 +-50.

 

Heat shield on cat? do a search i think there is a big thread on the misc. teg noises and solutions.

 

It could be your heat shield as he said. Rip it off and if you still get a rattle it's very possible that it could be rattling against the heatshield thats right above the cat against the body itself.

 

yeah heat shield, take that off and fab a new one

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rpizzle &raquo;</TD></TR><TR><TD CLASS="quote">yeah heat shield, take that off and fab a new one</TD></TR></TABLE>
yeah its definately the heat shield after the cat because i noticed some scratches from it on the exhaust piping. would there be any problems if i just took the heat shield off and didnt fab a new one?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GeeSeR96 &raquo;</TD></TR><TR><TD CLASS="quote">
yeah its definately the heat shield after the cat because i noticed some scratches from it on the exhaust piping. would there be any problems if i just took the heat shield off and didnt fab a new one?</TD></TR></TABLE>

No, your cabin might heat up a bit more but it'll be fine.

BTW, it's header not headers

 

No, no problems without a heatshield I don't think, but thats probably not what it is. Unless its just a coincidence that it happened when you installed the header, I would say that the mounting bracket is loose. When I put a header on my friend's LS, the 2 bolts on the bracket didn't line up right and it rattled.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by simon98h22 &raquo;</TD></TR><TR><TD CLASS="quote">No, your cabin might heat up a bit more but it'll be fine.

BTW, it's header not headers </TD></TR></TABLE>

well there's the problem.... he installed TWO manifolds!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Thrasher &raquo;</TD></TR><TR><TD CLASS="quote"> I would say that the mounting bracket is loose. When I put a header on my friend's LS, the 2 bolts on the bracket didn't line up right and it rattled.</TD></TR></TABLE>
yeah thats whats the problem with my header. the two screws that connect the cat to the header dont line up too well and the cat is at a bit of an upward angle. im guessing now that the header i bought got bent when it was scraped. when i got the header, the previous owner had dented them.